What’s on TV Saturday

8 P.M. (Lifetime) GRUMPY CAT’S WORST CHRISTMAS EVER (2014) Grumpy Cat, above, the sourpuss feline who rose to fame via the Internet about two years ago; appeared on the cover of New York magazine; and published a book, “The Grumpy Guide to Life,” tries out her acting chops. With the help of the vocal talents of Aubrey Plaza, of “Parks and Recreation,” Grumpy plays a lonely cat living in a mall pet shop — no one wants to take her home. She discovers that she can communicate with a 12-year-old girl. All of which leads Grumpy reluctantly to thwart the kidnapping of an exotic dog she personally can’t stand and then, after the mall closes on Christmas Eve, rescue her new friend as well.

8 P.M. (Hallmark) CHRISTMAS UNDER WRAPS (2014) After Dr. Lauren Brunell (Candace Cameron Bure) loses her fellowship and her boyfriend, she heads to remotest Alaska — and into the arms of a charming bush pilot (David O’Donnell). But his father (Brian Doyle-Murray) is hiding something in his top-secret shipping warehouse, and just when Lauren is about to get to the bottom of it, she receives news that could change the holiday forever.

8 P.M. (Discovery, Science) PUNKIN CHUNKIN: SUPERCHUNK! Pumpkins are so last year. This time around, engineers and backyard amateurs send televisions, pianos and even cars catapulting into a cornfield. Kari Byron and Tory Belleci, of “Mythbusters,” host.

9 P.M. (CUNY) MUNYURANGABO (2009) In this Lee Isaac Chung drama, two young men, Munyurangabo (Jeff Rutagengwa) and Sangwa (Eric Ndorunkundiye), make their way from Kigali, the Rwandan capital, to the farm where Sangwa’s parents live. Their interactions seem friendly enough, but once they arrive, Sangwa’s father is troubled by the machete that Munyurangabo carries with him. “ ‘Munyurangabo’ is both modest and ambitious,” A. O. Scott wrote in The New York Times about this first narrative feature in the Kinyarwandan language, whose script was mostly improvised by nonprofessional actors. “Shot in less than two weeks, it trusts that the implications of its intimate, almost anecdotal narrative will resonate in spite of its humble methods. But there is also an arresting audacity in a young American filmmaker’s attempt to tackle the raw and complicated reality of Rwanda, and what is most impressive is the care with which Mr. Chung manages this risky undertaking. He seems to have made this film above all by listening and looking.”

9 P.M. (FX Movie Channel) CEDAR RAPIDS (2011) The skyscrapers and a sparkling hotel swimming pool in Cedar Rapids, Iowa, signify the big time to Tim Lippe (Ed Helms, above center, with Isiah Whitlock Jr., far right), a 34-year-old insurance salesman and naïf arriving from Brown Valley, Wis., for a convention. Soon he’s trapped between the forces of his suitemate, Ronald Wilkes (Mr. Whitlock), a man of reason, and of Dean Ziegler (John C. Reilly), the gathering’s vulgar center of attention. Then there’s Joan Ostrowski-Fox (Anne Heche), the melancholy party girl who tugs at his heartstrings. But what Tim has really come for is the Two Diamonds Award, which he is meant to take to Brown Valley. Joan may call him Insurance Man, a kind of superhero, “but Tim isn’t super anything (though he proves heroic), and what makes ‘Cedar Rapids’ a low-wattage pleasure is its insistence that his ordinariness — with his decency and sense of wonder — is pretty extraordinary,” Manohla Dargis wrote in The Times.

10 P.M. (FYI) LATE NIGHT CHEF FIGHT Spun off from a real after-hours competition, this new series puts two Las Vegas chefs into unfamiliar food trucks, where they must cook three different dishes for a panel of judges. The winner earns bragging rights and a meal cooked by the loser. Laila Ali and Vic Moea host.

10 P.M. (CBS) 48 HOURS A woman struggling with addiction seeks help through an Alcoholics Anonymous program, where she meets the man who will ultimately kill her.

10 P.M. (H2) MUSEUM MEN Roger Barganier and his builders at Creative Arts Unlimited devise historical exhibitions for museums, starting with a King Tut display using a 3,000-year-old mummy and items from that ruler’s tomb.

What’s Streaming Now

COMEDIANS IN CARS GETTING COFFEE Miranda Sings, the Internet personality created by the comedian Colleen Ballinger, takes a ride with Jerry Seinfeld in a 1960 Austin-Healey Sprite. (crackle.com) KATHRYN SHATTUCK